PureAlert Pro — Pakistan's Only Water Tester That Turns Red When Your Water Is Unsafe
Most water testers give you a number. You then have to know what that number means, compare it to a guideline, and make your own judgment. For a parent, a school administrator, or a busy RO plant operator — that is one extra step too many.
The PureAlert Pro eliminates that step entirely.
When you dip this meter into your water and the TDS reading goes above 50 ppm, the entire LCD screen turns red — a bright, unmistakable visual alarm that tells you immediately: this water needs attention. No charts to consult. No numbers to interpret. Red means unsafe. Green means safe. It is that simple.
This is the feature that no other affordable water tester in Pakistan offers. And at only Rs. 1,499, it is accessible to every household, school, mosque, office, and RO plant from Karachi to Peshawar.
RED SCREEN ALARM: When water TDS exceeds 50 ppm, the full LCD screen illuminates RED — giving you an instant, unmistakable safety warning. No other TDS meter at this price point in Pakistan has this feature.
Who Needs the PureAlert Pro?
- Parents & Mothers — You cannot always watch what water your children drink at home. Keep the PureAlert Pro by your kitchen filter or RO tap. A quick daily dip tells you instantly if the water is safe. If the screen is green, your family is safe. If it turns red, change your filter.
- School Administrators & Teachers — Responsible for the water quality that hundreds of children drink every day. One PureAlert Pro per school water cooler is all it takes for daily safety checks.
- RO Plant Technicians & Operators — Use it for rapid output checks. The 50 ppm red alarm is perfectly set for RO output monitoring — if your purified water triggers the red alert, your membrane needs immediate servicing.
- Offices & Corporate Buildings — Water cooler and dispenser quality deteriorates between maintenance visits. A quick daily check with the PureAlert Pro takes five seconds and protects your entire team.
- Hospitals & Clinics — Water purity is critical in medical environments. The immediate visual alarm removes any room for misreading numbers under pressure.
- Mosques & Community Centres — Shared water sources used by dozens of people daily. One meter, one second, one clear visual answer.
- Students & Science Labs — Ideal for school and college water quality experiments. The visual alarm makes it engaging and easy to demonstrate water contamination concepts.
How the Red Screen Alarm Works
The PureAlert Pro uses a built-in threshold alert system calibrated to the WHO and Pakistan NEQS safe drinking water guideline of 50 ppm for purified/RO water output:
| TDS Reading | Screen Colour | What It Means |
| 0 – 50 ppm | GREEN (Normal) | Water is within safe RO output range — safe to drink |
| Above 50 ppm | RED (Alarm) | Water TDS exceeds safe threshold — filter check needed |
Important: The 50 ppm threshold is specifically calibrated for RO purified water output. For tap water or general drinking water, the WHO acceptable limit is 500 ppm. The PureAlert Pro is primarily a safety tool for RO output monitoring and pure water quality checking.
All Features of the PureAlert Pro
- Red Screen Alarm — Full LCD turns red when TDS exceeds 50 ppm. Instant, no-confusion water safety warning. First of its kind at this price in Pakistan.
- Backlit LCD Display — Test water in dim kitchens, storage rooms, labs, or outdoor sites after dark. The backlight ensures a clear reading in any lighting condition.
- HOLD Function — Press HOLD to freeze the reading on the screen. Record results without rushing. Useful in lab settings where readings need to be logged.
- Wide TDS Range 0–9990 ppm — Covers pure RO water (under 10 ppm) to highly contaminated water above 1000 ppm. Works for all water types across all Pakistan regions.
- ±2% Accuracy — Industry-standard accuracy sufficient for all practical home, school, office, and light industrial monitoring applications.
- Temperature Measurement 0–40°C — Built-in thermometer measures water temperature alongside TDS. Useful context for accurate readings and water system monitoring.
- Compact Pen Design 138×24×15mm — Slim, lightweight (35g), fits in a pocket, lab coat, or tool bag. Take it anywhere with zero inconvenience.
- Standard LR44 Button Cells — Runs on 2 × LR44 batteries, available at any mobile shop, stationery store, or supermarket across Pakistan.
- Meets QFC A13-2023 Standard — Manufactured to QFC quality standard, ensuring consistent performance and reliable readings.
- Protective Probe Cap — Keeps the electrode clean and protected when not in use, extending the life of the sensor.
How to Use the PureAlert Pro — 4 Simple Steps
Step 1: Remove the protective cap from the probe tip.
Step 2: Press ON/OFF to power on. The backlit LCD display activates.
Step 3: Dip the probe 2–3 cm into your water sample. Wait 3–5 seconds for the reading to stabilise. Watch the screen — if it stays normal, your water TDS is within 50 ppm. If the screen turns RED, your TDS is above 50 ppm and action is needed.
Step 4: Press HOLD to lock the reading. Press TEMP to check water temperature. Press ON/OFF to power off, or leave it — auto shut-off handles it.
PureAlert Pro vs. Basic TDS Meters — What Is the Difference?
Feature Basic TDS Meter PureAlert Pro Shows TDS reading Yes Yes Red screen safety alarm No YES — turns red above 50 ppm Backlit display Some models Yes — always included HOLD function Rarely included Yes — built in Temperature reading Some models Yes — 0 to 40°C Needs you to know ppm values Yes — you interpret the number No — screen colour tells you instantly Suitable for non-technical users Limited Yes — designed for everyone Battery Type 2 × LR44 1.5V Button Cell (included) Battery Capacity 160 mAh Operating Current 3 mA Net Weight 35g Dimensions 138 × 24 × 15 mm Quality Standard QFC A13-2023 Display Backlit LCD with colour alarm (green / red) Price Rs. 1,200 Delivery Nationwide COD — all cities Pakistan
Frequently Asked QuestionsQ: At what TDS level does the screen turn red?
A: The PureAlert Pro red screen alarm activates when TDS exceeds 50 ppm. This threshold is based on the recommended TDS level for RO purified drinking water. If you are testing RO output water and the screen turns red, your TDS is above 50 ppm — which means your RO membrane or filters need to be checked or replaced.
Q: Can I use this for tap water testing? The 50 ppm threshold seems very low for tap water.
A: Yes, you can use it for tap water, but keep in mind that the 50 ppm alarm threshold is calibrated for RO purified water. Most tap water in Pakistan reads 300–800 ppm, which will trigger the red alarm — this is expected and correct, as tap water does contain dissolved minerals. For general tap water safety, readings under 500 ppm are considered acceptable per WHO guidelines. Use the PureAlert Pro for RO output monitoring for best results.
Q: How is the PureAlert Pro different from the AquaCheck Pro also sold by Axtron?
A: The AquaCheck Pro (Rs. 1,800) features a titanium probe for longer lasting accuracy and is ideal for professional and heavy-use scenarios. The PureAlert Pro (Rs. 1,200) is designed for families, schools, and offices where the priority is instant visual safety feedback — the red screen alarm. If you need a simple, affordable meter that tells you immediately whether your water is safe without reading numbers, choose the PureAlert Pro.
Q: Do I need any technical knowledge to use the PureAlert Pro?
A: No technical knowledge is required at all. The entire point of the red screen alarm is to make water safety checking accessible to everyone — parents, children, school staff, office workers. You do not need to know what ppm means or what number is safe. Green screen means safe. Red screen means check your filter. That is all.
Q: Where can I buy the PureAlert Pro in Pakistan?
A: Order directly from axtronpakistan.com. We deliver with Cash on Delivery to all cities including Karachi, Lahore, Multan, Islamabad, Rawalpindi, Faisalabad, Peshawar, Quetta, Hyderabad, Sialkot, Gujranwala, Bahawalpur, and all other cities and towns across Pakistan.
Q: How long do the LR44 batteries last?
A: With 3 mA operating current and 160 mAh battery capacity per cell, normal use of a few tests per day will give several months of battery life. LR44 batteries are available at any mobile phone accessories shop, stationery store, electronics shop, or supermarket in Pakistan.